great_directors = ['Martin Scorsese', 'Steven Spielberg','Francis Ford Coppola']
great_directors[1]='Micheal Bay'

transformers =['Optimus Prime','Megatron','Bubblebee','Starscream']
transformers[2]='Grimlock'

camping_trip_supplies = ['Socks','Flashlight','Tent','Blanket']
camping_trip_supplies[0]='Food'

tech_companies =['Google','Microsoft','Blackberry','IBM','Yahoo']
tech_companies[1:-1]=['Facebook','Apple']